Liquid-fuel boiler-furnace.



C. l. LINDAU.

LIQUID FUEL BOILER FURNACE.

APPLlcATloN FILED mARzs. 1915.

Patented Sept. 7, 1915.

U Z s e CHARLES I. LINDAU, OF PEAB/CE, VE'LlZDNA.y

LIQUID-FUEL `BOILER-FURNACE.

Application ledMarch 23, 1915.

To all whom it may concern Be it known that I, CHARLES I. LINDAU, a citizen of the United States, residing at Pearce, in the county of Cochise and State of Arizona, have invented certain new and useful Improvements in LiquidJTuel Boiler- Furnaces, of which the following is a specication.

My invention relates to improvements in boiler furnaces using liquid fuel, such as oil or the like. 4 y

An important object of the invention is to provide means of the above mentioned char acter, so constructed that the heat derived from the combustion of the liquid fuel is transmitted in an economical manner to the receptacle or receptacles containing the water to be heated, without injury ito the receptacle or receptacles.

A further object of the invention is `to provide means of the above mentioned character adapted to e'ect the complete combustion, as far as possible,'of the oil or liquid fuel used.

A further object of the invention is to provide means of the above mentioned character, embodying a surface having a large area upon which `the flame is directed, the heat being reected from the surface to zthe boiler flues or tubes.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same, Figure 1 is a central vertical longitudinal sectional view through apparatus embodying my invention, and, Fig. 2 is a transverse vertical sectional view taken on line Qf-EZ of Fig. 1.

1n the drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 5 designates a heating shell or body portion of the furnace as a whole, which is formed of firev proof material, such as fire brick or the like.

Arranged diagonally within the shell 5 are inclined tubes or flues 6, extending downwardly toward the rearward end of the shell 5. These tubes or lines are spaced and their opposite ends communicate with end shells 7 and 8. The lues 6 are held stationary within the shell 5 by transverse bars or members 9, as shown. Arranged upon the top of the shell and inclosing the same a Specification of Letters ,Patent Patentedept. "Z, 1915.

Serial No. 16,110?.

horizontal boiler shell 10, the interior of which is placed in communication with the end shell 8 by a coupling 11. rEhe opposite end ofthe boiler 10 has communication with a pipe 12 in turn communicating with the end shell 7, as shown.

The numeral 13 designates an arch, eX- tending across the flues G, near their rearward ends, but spaced a substantial distance from the rearward end of the shell 5, and

preferably fed into the bottom of the shell or drum 10.

The numeral 15 designates `a blow `off pipe, communicating with the shell 7, as shown.

The numeral 16 designates the combustion chamber of the shell 5 arranged in the forward portion thereof below the flues 6, as shown. This combustion 'chamber has a bottom wall 17, which is longitudinally inclined and extends upwardly toward its rearward end. llhe wall 17 is transversely corrugated for providing the maximum heating surface and the corrugation is preferably effected by means of inclined bricks or members 19, arranged in a stepped order,

providing heating surfaces 20, which are `the outlet opening 1d thereof. The water is i fuel burner 25, disposed above and near the inclined bottom wall 17, as shown. This burner is preferably of the type shown in my allowed application for burners, Serial No. 877,151. filed December 14, 1911i, Patent No. 1,131,718. The burner 25 is adapted to atomize or vaporize the oil or liquid fuel and mix the same with air or steam. The fuel passes through a tip 26 and the flame and products of combustion are discharged in a downward direction,

to engage with the bottom wall 17, as shown.

Arranged. below and adjacent ther burner Q5, are openings 27, formed in the end wall i252, having; their forward ends in erroneom are intimately mixed and the combustion of the fuel is completed to a high degree. rEhe corrugated surface of the bottom wall 17 is large, and the heat reiected ory radiated therefrom passes upwardly and longitudinally toward the facev 22, and is delected thereby forwardly, to pass between the nues 6. Above these flues the heat and products of combustion travel rearwardly longitudinally of the flues and then downwardly between the members). The heat and products of combustion then travel upwardly and rearwardly between the flues and discharge through the opening 14: to the atmosphere, stack or the like. Instead of employing a single burner 25, two or more may be employed, in which event the openings 27 are separated by partitions arranged corresponding to the number of burners, and a door or damper employed to cover and uncover the opening or openings between each pair of partitions.

It is to be understood that the form of 'end of the bottom wall and projecting upwardly therebeyond for a substantial distance and having a forwardly inclined face upon its forward side; of a burner arranged substantially horizontally within the fire box overthe Aouter lower end of the bottom wall and having a downwardly discharging vHaine outletV device arranged 'at substantially a. right angle to its body portion, and means spaced a substantial distance from the burner for introducing yair into the fire box above the lower end of the bottom wall to travel between the bottom wall and the burner.

In testimony whereof I aiix my signature in presence of two witnesses.

CHARLES i. LINDAU.

`Witnesses GEORGE WM. FLEETHAM, CHAS. S. MoNMoNIER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,v Washington, D. G. 

